Room-to-grow rig for a friend's 12.5-year-old son. Also my first build :) Hard $800 budget, made possible through the magic of tax returns! He's been gaming on a midrange laptop and his mom decided she wanted her computer back, and that he should have something future-proof(ish) to shoot imaginary bad guys on.
Here are the things I fully expect him to add, possibly replace:
Needs another one or three 4gb units of RAM. He can add those himself and quite possibly get inspired to open the case for other purposes down the line.
The mobo doesn't have a USB 3.0 19-pin connector, so the front USB 3.0 port on the case is currently useless. I feel pretty bad about that, but this will fix it and until then I think he can make good use of all the rear USB ports. The monitor was a good deal and the integrated speakers were a big selling point for his mom, since it can now do double duty as a secondary TV. It's not a very good monitor, though, and I suspect they'll upgrade it to a large(r) IPS panel someday.
At which point, they may or may not be looking at dual monitors, and I don't think a Crossfire scenario would be totally out of the question by then. So he'd add another/get 2 new GPUs.
I got him a wireless card (not my personal choice for a desktop connection, but whatever) that doesn't do Bluetooth, so if he ever notices its absence I'll probably recommend a dongle (Monoprice has em cheap). Try as I might, the budget would just not cover an entry-level gaming keyboard, so for now I'm giving him a lightly-used Lenovo leftover. He already has a gaming mouse he's happy with, so now he can pick out a keyboard to match. Whatever the kids like these days. Probably 4 million LEDs.
I've seen commenters here say that SSDs don't belong in budget builds, but once this is handed over to the kid I want it to be as easy as possible for him to handle his own upgrades, and cloning the disk to migrate his OS to an SSD down the line seemed chancy at best. If he fills up the 1TB HDD, more power to him, but I think the storage situation will hold him for a few years at least. Plus I'm personally addicted to SSDs and can't imagine going back to booting from a platter.
This case leaves something to be desired, but for the price and the user it's a good fit. When the optical drive went in I noticed a slight gap around it in the mesh on the front, but I was looking closely and it probably won't be scrutinized like that by its owner. And the front plate itself feels flimsy, since it's plastic. Also, I realize this is probably a noob issue, but the cable management (or not) in here is bonkers. I definitely picked a poor case/PSU combo for making things look tidy. Here come the velcro straps!
As it came together, I realized that I couldn't help but pick things out that I'd love to have myself, so this build will be immediately followed by my more deliberate (slower and probably pricier) birthday gift from me to myself. If all goes well I'll edit here to add a link to that build.